[Issue 15504] core.demangle uses exception handling for normal control flow

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=15504

alex.jercaianu at gmail.com changed:

           What    |Removed                     |Added
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                 CC|                            |alex.jercaianu at gmail.com
           Assignee|nobody at puremagic.com        |alex.jercaianu at gmail.com

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